In mice, the sry gene is located on the y chromosome very close to one of the pseudoautosomal regions that pairs with the x chromosome during male meiosis. given this information, propose a model to explain the generation of unusual males who have two x chromosomes (with a sry-containing piece of the y chromosome attached to one x chromosome).
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Ответ:
The model showing the condition must represent a recombination between the X and Y chromosome during meiosis in male.
Explanation:
In males, the sex chromosomes are X and Y, whereas, the females have XX chromosomes. When the X chromosome of males fuses with the female gamete it give rise to a female progeny.
The Sry gene is present on the Y chromosome. In some cases, the recombination between the X and Y chromosome during meiosis in males takes place and result in an X chromosome containing Sry gene. This Sry gene is responsible for the male characters and progeny carrying two X chromosomes, in which one has the Sry gene would have the male characters.
So, the in this case should represented the crossing over between the X and Y chromosomes in males and then passing of the Sry containing X chromosome to progeny.
Ответ:
D It is made mostly of cellulose.
Explanation:
If you are taking the test from Edgeniuity that is the answer hope this helps someone.